According to Motoring’s chat with Porsche product line director Dr. Erhard Mössle, the current 991-series sports car will continue in production until the end of 2015. When the refresh hits, it will bring turbo engines to the formerly naturally aspirated Carrera and Carrera S models for the very first time.

At the bottom end, the Carrera will feature a 2.7-liter turbo flat-six, down from 3.4 naturally aspirated liters in the current model. This lowest-output 911’s new turbo engine will kick out an estimated 400 horsepower, up from 350 in today’s Carrera, while simultaneously improving fuel economy to somewhere near 30 mpg.

One step up from the base model, the updated Carrera S will replace the 400-horse naturally aspirated 3.8-liter with a turbo 3.4 flat-six. Motoring’s conversation revealed only that the new turbo engine will put out “more than 400 horsepower,” which makes sense—traditionally, the Carrera S offers about 50 more ponies than the non-S.

At the top end of Porsche’s performance ladder, the updated 911 Turbo, Turbo S, and GT2 will all keep their current 3.8-liter turbo flat-sixes. For the time being, Porsche’s most track-oriented GT3 and GT3 RS models will stay blessedly naturally aspirated. Mössle also reassured Motoring that the facelifted 991-generation 911 won’t see any hybrid drivetrains.

As for the long-term future? Expect the fully updated next-gen 911 to launch in 2020. That’s when, according to Mössle, Porsche will have to bite the bullet and incorporate some sort of hybridized powertrain in the 911 lineup.

“If CO2 targets get even tighter in 2030 and beyond, we won’t be able to do it without electrification,” Dr. Mössle said.